> AFAIK you can't choose to only label "some" tapes in the library 
> when using auto-labeling. If some of the barcodes are unreadable, 
> you will run into errors.

Yeah, I didn't think so. Ratz.

> What you could do, is partition your library and then set one up 
> with auto-labeling and have the other one use all the old tapes 
> using the old standards.
> 
> You could of course also consider staging all savesets from all the 
> old tapes to new tapes with correct barcodes, but that might involve
> quite a lot of work ;)

I have 4500+ tapes I would need to do that to, and a legal restriction 
forbidding overwriting removable media, which means I would need to 
purchase 4500 new tapes, just to use new barcode labels. So no, that ain't 
gonna happen. :-)